Bowl liner for gyratory crushers



Nmr. 13,1956 0. c. GRUENDER flfi fi BOWL LINER FORYGYRATGRY CRUSHERS Filed Oct. 28, 1952 1L Sheets-Sheet l ZOW Oscar C, fimfender NW. 13, 1956 o. c. GRUENDER LINER FOR GYRATORY CRUSHERS BOWL Filed Oct. 28, 1952 4 Sheets-Sheet 2 J7? vewzor Oscar Graemder fneys NW 1, 1; o. c. GRUENDER BOWL LINER FOR GYRATORY CRUSHERS 4 Sheets-Sheet 3 Filed Oct. 28, 1952 jmvw? for Wm 13, 1956 o. c. GRUENDER 2,77,,4

BOWL LINER FOR GYRATORY CRUSHERS Filed Oct. 28, 1952 4 Sheets-Sheet 4 United States Patent BOWL LINER FOR GYRATORY CRUSHERS Oscar C. Gruender, Milwaukee, Wis., assignor to Nordberg Manufacturing Company, Milwaukee, Wis, a corporation of Wisconsin Application October 28, 1952, Serial No. 317,193

8 Claims. (Cl. 241--299) Another purpose is to provide such a member with means to provide lateral displacement.

Another purpose is to provide an improved locking means for such a member.

Another purpose is to provide means whereby such a member, when not locked, may be rendered self-tightenmg.

Other purposes will appear from time to time in the course of the specification and claims.

I illustrate my invention more or less diagrrammatically in the accompanying drawings, wherein:

Figure 1 is a vertical axial section;

Figure 2 is a section on the line 22 of Figure 1 with parts omitted;

Figure 3 is a detail of one element of a segmental nut;

Figure 4 is a section on an enlarged scale on the line 4-4 of Figure 2;

Figure 5 is a section on an enlarged scale on the line 5-5 of Figure 2;

Figure 6 is a view similar to that of Figure 2 and showing an element of the alternative self-tightening feature.

Figure 7 is a detail view on an enlarged scale taken on the line 77 of Figure 6.

Like parts are indicated by like symbols throughout the specification and drawings.

With particular reference to the below-described selftightening feature of my invention, this disclosure constitutes a continuation in part of the disclosure in my application Serial Number 161,769, filed May 13, 1950, now issued as Patent No. 2,670,142, dated June 4, 1953.

Referring to the drawings, I illustrate parts of the crusher or grinder with which my invention is to be employed.

1 indicates what will be understood to be a circumferential main frame member. It includes a central hub 2 in which is positioned a normally fixed shaft 3 having an upwardly extending generally cylindrical portion 4. Surrounding said upper portion 4 of the shaft or pedestal 3 is an eccentrically apertured sleeve 5. The sleeve has keyed to it a bevel gear 6 shown as in mesh with a pinion 7, which will be understood to be rotated by any suitable shaft, not herein shown. In response to the rotation of said shaft, the eccentrically apertured sleeve 5 rotates about the cylindrical pedestal shaft portion 4.

A generally indicates a head structure which includes a sleeve 9. This sleeve surrounds the exterior of the eccentrically apertured sleeve 5. It will be understood that the exterior and interior bearing surfaces of the sleeve 5 are not merely eccentric, but are formed about converging axes as indicated at X and Y of Figure 1. These axes are shown as converging at the point Z. Secured to or formed unitarily with the sleeve 9 is a conic head portion 10, upon which ismounted the mantle or 2 Wear-taking plate 11. It may be held in position for example by the conic thrust ring 12, which receives the pressure of the locking ring 13, which is in screw-threaded relation with the upper extension of the head 10, as at 14.

Mounted upon the upper portion of the main frame 1,. I illustrate a bowl supporting ring 20. lit may be downwardly circumferentially channeled, as at 21, to seat upon and about a centering positioning flange 22, shown as positioned upon the circumferential main frame member 1. A suitable yielding release means, not herein shown, may be employed for permitting the ring 20 to tilt upward ly in response to the passage of uncrushable material or masses through the crusher or grinder.

Adjustable with the bowl support or ring 20 is a bowl 25 which is shown as including a generally cylindrical outer portion 26 in screwthreaded relation with the upper extension 20:: of the ring 20. It has also inwardly extending ribs 56 and portion 27 which has a lower generally conic bearing face 28 and an upper generally flat face 29. 30 generally indicates a bowl liner which has an upper outer conic surface 31 conforming to the opposed conic surface 28 of the bowl 25. In the upper conic surface 31 is inwardly directed groove or recessed locking slot 51, the walls of which are vertical when the liner 30 is installed to permit the entrance there into by an extended portion of the key or locking pin 50 which is embedded in the conic surface 28.

The bowl liner 30 has a lower inner wear-taking or crushing or grinding surface shown as including two con verging conic surfaces 32 and 33. It has an upwardly exten-ding inner portion 34 bounded by a slightly flared and non-crushing surface 35. The upwardly extending portion 34 has a circumferential outwardly extending centering flange 36 and an outwardly extending upper locking flange 37, the two flanges being separated by a circumferential channel 38. A somewhat smaller channel 39 separates the lower centering projection 36 from the conic surface 31. It will be noted that the member 30 is so proportioned in relation to the member 27, that the centering or positioning flange 36 fits fairly snugly within the cylindrical inner upper surface 28a of the member 27. The locking flange 37 is of such diameter that it, like the flange 36, will pass readily through the aperture surrounded by the bowl surface 28a when the member 30 is being upwardly inserted or downwardly removed. The locking flange 37 is spaced sufficiently above the horizontal bowl surface 29 to permit the insertion beneath the locking flange 37 of a locking member which is located above the surface 29. I may employ, for example, channelled locking segments 40, having an inward channel 41 adapted to receive the flange 37 and thus engage its lower surface while overlying also its upper surface.

The segmental member 40 is in the form of a threaded ring with the exterior threads 42. These threads mesh with a segmental nut formed by a plurality of parts 45 which may be locked removably together by upwardly extending end lugs 46 through which pass any suitable locking members or bolts 47. The segmental ring 40 may be held against rotation in relation to the bowl liner 30 by any suitable keys 48, the flange 37 has outwardly open notches circumferentially spaced thereon, the segmental ring 40 has secured thereto, as by welding, the keys 48 adapted to fit within these notches and thus to provide the means for preventing relative rotation between the ring 40 and the bowl liner 30 as illustrated in Figures 2 and 5.

In Figures 6 and 7 I illustrate the alternative selftightening feature of my invention. I provide the segmental locking plate 52. The plate 52 has an internal notch 53 adapted to receive upstanding lugs 54 on the nut 45. The plate 52 also has external notches 55 adapted to receive the ribs 56. The plate 52 has supports 3. or legs 57 downwardly extending to seat upon the upper face 29'of the inward portion 27 of the bowl While two legs 57 are shown they may vary in number or may be annularly co-extensive with the plate 52..

It will be realized that whereas. I have described and shown a practical and operative device, nevertheless many changes. may be made in size, shape, number and disposition of parts without" departing from the spirit of, my invention. I therefore wish my description and drawings to be taken as in a broad sense illustrative or diagrammatic rather than as limiting me to my precise showing herein.

The use and operation of my invention are as follows:

I provide a bowl liner or upper crushingymember whichseats firmly against the conic surface 28' of the bowl' 25. The liner 30 has its upper projection 34 and its outwardly extending locking flange 37 so positioned in relation to the upper surface 29 of the bowl that the locking members can readily be applied thereto. The locking members include the segmental ring 40 outwardly threaded to receive the segmental nut 45. I find it practical to make each of these members of a plurality of segments and to stagger the divisions between the segments, as shown for example in Figure 2. In order to tighten the device, it is necessary merely to rotate the segmental nut in the proper direction in relation to the segmental ring 40. The ring segments are held against rotation, for example, by the keys 48. In response to rotation of the nut segments 45, the channeled segmental ring 40 exerts pressure upwardly against the lower surface. of the flange 37. \Vhen it is desired to remove or release the liner 3%, this can be done by removing the nut segments 45, which permits the ring segments 40 to be, outwardly withdrawn. Locking thrust is exerted by the bottoms of the nut segments 45 against the top surface 29 of the bowl. No parts are wedged or confined in such fashion as to make removal difficult. The securing ring segments are removed readily laterally when the liner has to be changed. It will be understood that in operation, the crushing reaction set up between the liner 30 and the liner 11 has. a tendency to rotate the liner 30. In one form of my invention I provide means to prevent this rotation or move ment of the liner 30, including the slot 51 and thekey 50. The key or lock pin is embedded in the conic face-28 of the bowl 25 and has. an extended portion illustrated as extending at an angle perpendicular to the plane of the face 28. The vertical Walls of the slot 51 permit the entrance of the key 50 when the liner 30 is raised. into operating position. It will be understoodv that the key 50 could be vertically disposed. When the metal of the F liner 3%] tends to flow or stretch and the liner 30- tends to rotate a side wall of the slot 51 is impinged against the key 50 and the liner is locked against rotation.

It may be desirable, in a particular installation, topermit the liner 30-to rotate slightly. tive to the key 50 and the slot 51 which may be called a self-tightening feature, illustrated in Figures 6 and 7. When this feature is employed the key 50 is removed from the structure. The plate 52, through inter-engagement of the fixed ribs 56, the notches 55, the notches 53 and the lugs 54 prevent any rotation. of the nut 45. Thus as the bowl liner 30 rotates, it causes a correspond ing rotation of the externally threaded locking ring 40 to whichit iskeyed bythe keys'48and theflange37. Since the nut 45 is held against rotation by the plates52, the rotation of the ring 40, which is in inter-threaded relationship to the nut 45, causes the ring 40 to'rise thus exerting upward pressure on the lower surface of the flange 37 withwhich thering 40 is in interpenetrating relationship. As the flange 37 is forced upwardly, it? forcestthe liner 30' against the inward portion or bowl.- liner support- 27. T hustheliner 3.0 is self-tightening,rotation thereof causing a tighteningofthe liner SO-against thesupport-27.

Whenremoval of the. liner 30 is desired, itis a: simple matter tolift thelocking plate 52 upwardly out of look- I provide analternaing position, and to remove the locking bolts 47, permitting easy removal of the nut 45;

In the use of my ring with the particular crusher shown, it is important that it be closely set and that it be located centrally with respect to the axis of the machine. The centering flange 36 performs this function. In a sense, the two-part segmental ring 40 constitutes an outward extension of the liner 30 to a point overlying the uppersurface 29' of'the bowl; This permits'the use of the adjustable and. simple locking means above described. However, by rernoving the segmental ring parts, the liner 30 can be readily downwardly withdrawn.

I claim:

1. In a bowl liner for gyratory crushers and the like, a body portion having a generally conic upper surface and having an upward extension from the upper inner edge of said conic upper surface, said upward extension having a circumferential outer channel thereabout located at a level above the plane in which the inner edge of said conic upper surface terminates, said' circumferential channel being upwardly bounded by an outwardly extending locking flange, the exterior diameter of whichapproximates the diameter of the upper inner edge of said conic upper surface and an outwardly extending, centering, flange carried by said upward extension and having an outer surface located above the upper-most part of the conic upper surface of the bowl liner, but downwardly eparated from the locking flange by the circumferential channel.

2. In a bowl liner assembly for gyratory crushers, a body portion having a generally conic upper surface. and having an upward extension from the upper inner edge of said upper surface, said upward extension having a circumferential outer channel thereabout located at a level above the plane in which the inner edge of said conic upper surface terminates, said channel being upwardly bounded by an outwardly extending locking flange the, ex.-

, terior diameter of which approximates the diameter of the upper inner edge. of said conic upper surface, and a segmental outwardly threaded ring having a plurality of segments formed and proportioned to enter said circumferential channel and to interpenetrate with said outwardly extending locking flange and means for causing vertical movement of said body portion and said' ring when the same are in engagement, including a removable, revolvable nut surrounding and in screw-threaded engagement with the segmental, outwardly-threaded ring.

3. The structure of claim 2, characterized by and including means for preventing rotation of the segmental ring in relation to the locking flange.

4. In a crusher or attrition mill, including a bowl, and a wearing liner therefor, means for automatically tightenlng said liner against said bowl in response to relative rotation therebetween, including an outwardly extending flange adjacent the upper edge of the bowl liner, said flange beingv exteriorly notched, a segmental ring apertured to receive said flangev in interpenetrating relationship a segmental nut surrounding and threadably engaged with said ring, a key in said segmental ring formed and adapted to'enter said notch, and means for locking the segmental ringagainstmovement in relation to the bowl.

5. The structure of claim 4 wherein said key is rigidly fixedto said ring.

6. In a bowl: liner for gyratory crushers and the like, abody portion having a generally conic upper surface and having an upward circumferential extension from the upper inner edge of the conic upper surface, a circumferential centering flange extending outwardly from said extension and spaced upwardly from the upper inner edge of said conic upper surface; a circumferential locking flange extending outwardly from the upper edge of said extension and spaced upwardly from said centering flange.

7. In a crusher or attrition mill, including a bowl and a. wearing liner therefonmeans for automatically tightening said liner against said bowl in response to relative rotation therebetween including an outwardly extending flange adjacent the upper edge of said bowl liner, a segmental ring apertured to receive said flange in interpenetrating relationship, locking means associated with the said segmental ring and said flange to prevent relative rotation therebetween, a segmental nut surrounding and threadedly engaged with said ring and additional locking means associated with said nut and said bowl to prevent relative rotation therebetween.

8. In a crusher, a bowl member having a conic inner surface, a liner member for said bowl member having a conic upper surface, said liner member having also an upward circumferential extension from the upper inner edge of its conic upper surface and a circumferential locking flange extending outwardly from said extension, means on the bowl member cooperating with said circumferential locking flange and formed and adapted to hold the locking flange and tighten the liner surface against the bowl surface, and additional means for locking said member against relative rotation, said additional means including a projection from the conic surface of one of said members, and a Well in the conic surface of the other of said members, said projection and well being positioned for interpenetrating relationship when the liner member is held upwardly locked against the bowl.

References Cited in the file of this patent UNITED STATES PATENTS 243,545 Gates June 28, 1881 271,138 Sharpneck Jan. 23, 1883 652,208 Hadfield June 19, 1900 768,955 Russell Aug. 30, 1904 1,029,742 Capen June 18, 1912 Symons July 6, 1915 Symons May 15, 1917 Sanborn July 8, 1919 Sanborn Jan. 3, 1922 Symons May 12, 1925 Symons Sept. 8, 1925 Symons Sept. 23, 1930 Symons Feb. 10, 1931 Symons Aug. 4, 1931 Symons June 14, 1932 Symons July 19, 1932 Symons Oct. 15, 1935 Jacobson Sept. 15, 1936 Knudtzen Aug. 17, 1937 Gruender Aug. 31, 1937 Campbell Oct. 11, 1938 Brown Nov. 1, 1938 Fahrenwald Feb. 21, 1939 Rumpel May 16, 1939 Gruender Dec. 3, 1940 Fahrenwald Sept. 2, 1941 Browning June 30, 1942 Gruender Dec. 22, 1942 Gruender Dec. 29, 1942 Gruender Feb. 9, 1943 Gruender Feb. 15, 1944 Eiben June 6, 1944 Gruender Oct. 10, 1944 Rumpel Oct. 15, 1946 FOREIGN PATENTS Sweden Sept. 28, 1937 Germany Feb. 17, 1938 France Sept. 18, 1939 

